It is a constant sound that is made up of two different sounds, one of them having small pauses in the same interval. It was activated with the start button on the treadmill.
Using an atm kiosk: sounds of pressing chunky metal buttons and the resulting beeps, as well as the motor of the atm as it ejects money and prints a receipt.
Opening and closing an old slide-up phone and pressing the buttons (with and without tones). Different phone numbers (funny pressing melodies). Dialing tone while waiting for answer. Ringing tone with vibration. Vibration only. Error melody. Message signals with vibration. Alarm tones.
The sound of a traffic light button sound with pitch differences and turned into a 3 note melody with added reverb. Recorded and processed in audacity.
Just some tongue clicking. Recorded for my game fat sheep (don't ask). Recorded with a blue snowball and edited with audacity to remove background noise.